Answer
$\angle$AOB and $\angle$DOC
Work Step by Step
A pair of vertical angles are opposite angles made by two intersecting lines. $\angle$AOB and $\angle$DOC are opposite angles made by the intersection of $\overline{AC}$ and $\overline{DB}$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.